summaryrefslogtreecommitdiff
path: root/fs/xfs/xfs_buf.h
diff options
context:
space:
mode:
authorDan Williams <dan.j.williams@intel.com>2017-08-24 15:12:50 -0700
committerDan Williams <dan.j.williams@intel.com>2017-08-31 09:31:47 -0700
commit486aff5e04823bb1e60c4045226eb244024b8420 (patch)
treec0cc960b998086e92873d918f203a5e737e97db6 /fs/xfs/xfs_buf.h
parent78f35473508118df5ea04b9515ac3f1aaec0a980 (diff)
xfs: perform dax_device lookup at mount
The ->iomap_begin() operation is a hot path, so cache the fs_dax_get_by_host() result at mount time to avoid the incurring the hash lookup overhead on a per-i/o basis. Reported-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'fs/xfs/xfs_buf.h')
-rw-r--r--fs/xfs/xfs_buf.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index 20721261dae5..bf71507ddb16 100644
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -108,6 +108,7 @@ typedef unsigned int xfs_buf_flags_t;
typedef struct xfs_buftarg {
dev_t bt_dev;
struct block_device *bt_bdev;
+ struct dax_device *bt_daxdev;
struct xfs_mount *bt_mount;
unsigned int bt_meta_sectorsize;
size_t bt_meta_sectormask;
@@ -385,7 +386,7 @@ xfs_buf_update_cksum(struct xfs_buf *bp, unsigned long cksum_offset)
* Handling of buftargs.
*/
extern xfs_buftarg_t *xfs_alloc_buftarg(struct xfs_mount *,
- struct block_device *);
+ struct block_device *, struct dax_device *);
extern void xfs_free_buftarg(struct xfs_mount *, struct xfs_buftarg *);
extern void xfs_wait_buftarg(xfs_buftarg_t *);
extern int xfs_setsize_buftarg(xfs_buftarg_t *, unsigned int);